Electro-optical display element
US3960751A · kind A · utility
45Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1974 |
| Grant date | Jun 1, 1976 |
| Priority date | — |
| Expiry date | Sep 16, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/603
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An electro-optical element comprising a nematic liquid crystal composition and at least one compound represented by the formula: ##SPC1## Wherein R is an alkyl radical having from 4 to 20 carbon atoms. Said compounds are pleochroic dyes having a special function which differs from hitherto known dyes in their interaction with nematic liquid crystal molecules. The electro-optical element makes it possible to obtain a liquid crystal display device which exhibits the desired figure in color differing from background colors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.